Yes, I admit it…I’m older than 60, and the survey didn’t even have the respect to include a fractional representation of what percentage of Twitter users are 61-65!!!

In all fairness, Sysomos admits only 0.7% of users disclosed their age for this survey, with younger users showing a higher probability of doing so.

But, this is great! I can snipe all I want from the Twitter sidelines, and no one will know who did it, ’cause on Twitter, I’m invisible! ;-}

Actually, all kidding aside, this Sysomos study of Twitter is impressive! Here are some of the salient points they discovered:

Sysomos conducted an extensive study to document Twitter’s growth and how people are using it. After analyzing information disclosed on 11.5 million Twitters accounts, we discovered that:

• 85.3% of all Twitter users post less than one update/day • 21% of users have never posted a Tweet • 93.6% of users have less than 100 followers, while 92.4% follow less than 100 people. • 5% of Twitter users account for 75% of all activity • There are more women on Twitter (53%) than men (47%)

• New York has the most Twitters users, followed by Los Angeles, Toronto, San Francisco and Boston

• More than 50% of all updates are published using tools – mobile and Web-based – other than Twitter.com. TweetDeck is the most popular non-Twitter.com tool with 19.7% market share

• Of the people who identify themselves as PR professionals, 15% follow more than 2,000 people. This compares with 0.29% of overall Twitter users who follow more than 2,000 people.